US2392812A - Sifting device - Google Patents

Description

Jan. 15, 1946. H. P. FARIS ET AL SIFTING DEVICE Filed April 24, 1943 INVENTORS HAROLD P. FARIS ATTORNEYS Patented Jan. 15, 1946 UNITED STATES PATENT oFFlca SIFTING DEVICE Harold P. Faris, Philadelphia, Pa., and John E. White, Trenton, N. J., assignors to National Automotive Fibres, Inc., Detroit, Micin, a corporation of Delaware Original application October 28, 1940, Serial No. 363,196. Divided and this application April 24, 1943, Serial No. 484,435

2 Claims.

cement coated surface of suitable carpet mate-- rial such as a burlap covered base of rubber while the carpet material is being vibrated so that the'vibration imparted to the carpet material will cause the flbers distributed by the sifting device to be imbedded endwise into the cement to simulate the pile of a conventional woven carpet.

Another object is to provide a rotary sifting device having a polygonal framework covered by screening through which the fibers are sifted and distributed as the device rotates.

Another object is to provide a sifting device to which the cut fibers may be introduced by an airy stream and in which a baiiie or deflector is provided to break up the air stream and thereby especially ,when considered in connection with the accompanying drawing, wherein:

Figure 1 is a fragmentary longitudinal sectional view through a sifting device embodying our invention;

Figure 2 is a transverse sectional view through the device on a somewhat enlarged scale;

Figure 3 is an enlarged fragmentary sectional view through the device, and showing the screen V work, B is the screening, C is the clamping and prevent the fibers being carried longitudinally" through the device.

Another object is to provide a sifting device having means preferably in the form of knockers engageable with the screening of the device for vibrating the same during rotation thereof so that the maximum percentage of out fibers introduced to the device will pass through and be sifted by the screening thereof.

Another object is to provide a rotary sifting device having its axis inclined to the horizontal to facilitate the passage through the screening of the device throughout its length of the cut flbers introduced thereto.

Another object is to provide a sifting device wherein the free edges of the screening upon the polygonal framework are held together by clamping and tensioning means which is located in substantially uniformly spaced relation to the knockers aforesaid to provide a substantially balanced structure. I

Another object is to provide a sifting device that is simple in construction, economical to manufacture, easy to install and operation.

Other objects, advantages and novel details of construction of. this invention will be made more apparent as this description proceeds,

efficient in clamping and tensioning means;

Figure 4 is a fragmentary elevational view of the clamping and tensioning means and associated parts illustrated in Figure 3;

Figure 5 is a sectional view on an enlarged scale through the framework at substantially the line 6-5 in Figure 2, showing the knocker assembly.

Referring now to the drawing, A is the framel0 and II respectively of metal or other suitable material supported by spokes l2 extending radially from hub members l3 on a. driven shaft l4 I'he screening B may be any suitable material and covers the framework A. Preferably the free edges of this screening are connected together by the clamping and tensloning means C which preferably consistsof clamps 20 and 2| respectively that grip the screening at the free edges thereof, a bolt 22 rigid with one section 23 of the clamp 20 and engaging an-aperture in a section 24 of the other clamp, and adjusting nuts 25 and 26 respectively on the bolt 22 above the clamp section 24. Thus, the screening B may be held and tensioned on the framework A by adjusting the nuts 25 and 26 on the bolt 22.

The deflector D is adjustably mounted on the shaft l4 preferably near the inlet end 30 of the sifting device and is in the path of the stream of air that is employed to introduce the cut fibers into the sifting device. Any suitable means such as a set screw 3! may be employed to hold the deflector D in adjusted position on the shaft it. As shown, the deflector D is dished or submade of metal and is substantially U-shape in configuration. In orderthat such knockers may strike the screening B to vibrate the same during rotation of the sifting device, the arms II and I of the knockers are pivoted to bracket 42 and 43 respectively rigid with the framework A. Thus, upon rotation of the sifting device, the knockers E will swing about theirpivots to and from striking engagement with the screening B. The resultant vibration of the screening B will be sumcient to facilitate radial passage of the cut fibers through the screening of the device and thereby cause a larger percentage of the cut fibers to be sifted or distributed by the-device onto the adheslvely coated carpet material mentioned. Moreover, these knockers tend to prevent the fibers from balling up and forming pills which otherwise may obstruct or impede the desired action. In use the cut fibers are introduced into the right hand inlet end of the sifting device toward and against the deflector D which will break up the air stream and prevent the fibers from being carried out the other end of the device. Such deflector D will also cause the fibers introduced to be scattered within the device to more readily engage the screening B thereof and be sifted thereby, In this connection it will be noted that the device is inclined to the horizontal from the inlet end 30 to the other end thereof so as to facilitate the e through the screening B of the device throughout its length of the cut fibers introduced thereto. If desired the lower end 50 of the device may have an outlet opening 5| therein, and suitable means such as a conduit (not shown) may be employed to receive from said outlet opening ii any fibers which pass longitudinally of the device without being sifted radially through the screening B thereof. As the device rotates the knockers B will vibrate the. screening B and expedite the passage of the cut fibers radially through said screening. Thus,

the maximum percentage of fibers introduced to the device will be sifted through the screening B thereof onto the adhesive coated carpet material aforesaid.

What we claim as our invention is:

i. A rotary sifting device for cut fibers, comprising an elongated reel ofhexagonal cros section, screening extending eircumferentially about said reelto cover the same, opposite longitudinal edge portions of said screening being disposed in overlapping relation upon one of the six sides of said reel, separate clamps for said edge portions on said one side or the reel, an adjustable connection between said clamps for tensioning the screening on said reel, brackets fixed to two other of the six sides of said reel, and knockers for said screening freely pivoted to said brackets,

the two sides of said reel to which said brackets and knockers are connected being alternate sides of said reel spaced equidistantly from said one side upon which said clamps and adjustable connection are mounted, whereby said reel is substantially balanced.

2. A. rotary sifting device for cut fibers, comprising an elongated reel of polygonal cross section covered with screening and covered at one end with an axially disposed inlet through which cut fibers may be introduced by an air stream, and means within the reel for breaking up the air stream and fibers introduced into the reel through said inlet so that such fibers will not be carried by said air stream axially through said reel, including an axially mounted deflector near said inlet in the path of said air stream, said deflector being dished and opening toward said inlet so that the fibers introduced by the air stream will be scattered radially within said reel toward said screening to be sifted thereby during rotation of said device.

HAROLD P. FARIB. JOHN E. WHITE.

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